Objects: Instances of Classes

AP Computer Science A· difficulty 3/5

public class Holder {
    private int n;
    public Holder(int n) { this.n = n; }
    public int getN() { return n; }
    public void setN(int n) { this.n = n; }
}
// ...
Holder a = new Holder(1);
Holder b = a;
b.setN(42);
System.out.println(a.getN());

What is printed?

A
$0$
B
$1$
C
$42$
check_circle
D
$Compile-time error$

Explanation

a and b refer to the same object; modifying via b is visible via a.

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